Month indication, Atmos Classique Phases de lune

Despite the small amount of energy available, Jaeger-LeCoultre has proved capable of developing complications for the Atmos clock, such as the month indication visible at the dial centre.
On l'Atmos Classique Transparente Phases de Lune, the additional indication of the month is siutated on an openworked disc in the centre of the glass dial.